Fig. 3

Phylogenetic trees of the HA and NA genes of JX14737. Trees were built by the neighbor-joining method using the MEGA6 software package (bootstrap value = 1000). The JX14737 H9N2 virus isolated from Jingdong Bird and Flower LPM in this study is highlighted by a red circle. The G57-like strain represented by A/chicken/Zhejiang/HJ/2007(H9N2) is highlighted by a blue square. The Y280-like strain represented by A/duck/Hong Kong/Y280/1997(H9N2) is highlighted by a pink rhombus. The G1-like strain represented by A/Quail/Hong Kong/G1/1997(H9N2) is highlighted by a green triangle. The phylogenetic trees of the HA and NA genes of JX14737 are a and b, respectively